Furnace



June 7, 1927. 1,631,116

E. BARELMAN FURNACE Filed May 20, 1925 l'atented June 7, 1927.

- UNITED STATES" PATENT OFFICE.

E DWABD BARELMAN, OI GUELPH, ONTARIO, CANADA.

FURNAGE.

Application filed Kay 20, 1925. Serial No. 31,721.

,, This invention relates to furnace construction and relates more particularly to furnaces of the hot air type in which dust and dirt from the air usually collects in some pocket in the furnace.

In furnaces of the hot air type, it has been found that the dust and dirt in theair usually accumulates in a layer at the bottom of the down or cold air duct. As this dirt contains considerable germs and other objectionablematter, it is desirable that it be cleaned out .at frequent intervals and be burned up. With hot air furnaces of the usual construction, it is di-flicult to clean out this foreign matter without complete disassemblyof the furnace. With furnacesflof the hot air type, it has also been found that, when ithe. furnace is located in the basement of the building, the latter does not become heated by the furnace as all the heat is .distributed toup-stairs rooms, and at times it becomes desirable to heat the basement.

An object of this invention is to provide a furnace, the inside of which is readily accessibleso that the dust, dirt ,and germs accumulated can be cleanedout at frequent intervals.-

I Other objects of this invention are to provide a furnace construction in which the outer casing can be opened at :the bottom to permit cold air to be drawn from the basement so as to warmsaid basement; also to provide a furnace with a bottom section of the outer casing which is simple of construction and which can be tightly closed and can be easily opened; also to improve furnace construction in other 1 respects hereinafter specified-and claimed.

Reference is to be had to the accompanying drawings forming a part of this application in whic'h- Fig. 1' is a perspectiveview of an improved furnace embodying my invention.

Fig. 2 is a central sectional elevation thereof. 1

Fig. 3 is a transverse sectional plan view thereof onthe line 3-L3of Fig. 2 showing the improved casing in closed position.

Fig. 4 is a sectional view similar to Fig. 3 but-with the improved casing section in open position. 1

Fig. 5 is a fragmentary elevation of animproved fastening device for holding the sections of the bottom casing together.

l 'Eig. 6 is asectional viewnear the fastening device taken on the line 66 of Figure 5. r V

Fig, 7 is a transverse sectional view taken above the fastening device. 7

It is a Well known fact that in all kinds of hot air furnaces, dust and dirt will settle out of the air and collect in pockets in said furnace, usually at the .bottom of the cold air duct, and in the pipeless type of furnace, any material that may be dropped through the register will find its Way to the bottom of the air duct of the furnace. While a furnace of the pipeless type is shown in the drawings, it should be understood that any other type of hot air furnace, such as a pipe furnace of the hot air type, may be-fitted with my ismprovedycasing.

Referring to the accompanying drawings in detail, 10 indicates a heating element which may be heated by coal, wood, oil or other heating medium. In the particular heating element shown, the products of combustion pass out through a fine 11 and the ashes or other refuse are removed through an ash door The heating element 10 is enclosed in an outer casing 13 which is supported by a plurality of annular rings 14, which are usually secured to the heating element or furnace 10, for example to the por-- tion thereof extending to the front of the fiurnace. A cylindrical bafile or partition wall 15 is positioned between the outer casing 13 and the heating element 10 and is preferably arranged substantially concentric with the latter and said cylindrical bafile has a section 16 which may be in the shape of a truncated cone and which terminates at its upper reduced end in a pipe or hot air duct 17. The hot air duct is arranged within a rectangular pipe 18 of larger diameter attached to the upper end of the outer casing 1.3. The lower end 19 of the baffle or partition wall 15 is spaced above the floor 20 or base of the furnace and is supported by standards 21.

A pipeless furnace of this kind is usually located in the basement with the upper ends of the pipes 17 and 18 extending through the floor of the room above and bein covflows down the space between the hot air duct 17 and the outer pipe 18 and between the partition wall 15 and outer wall 13 and passes under the bottom edge 19 of said baffle and up again aroundthe heating element so that a continuous circuit of air is formed. With furnaces of the usual type, the outer casing 13 extends to a supporting ring 22 resting on the floor 19 andv no pro the lower part of the'outer casing of thefurnace in such a manner that this part of the casing may be readily opened to afford access to the portion of the floor or base of the furnace between the outer casing and the heating element, so that any material that may have accumulated in this portion of the furnace may be removed; In the particular construction shown in the drawings, 1 provide a bottom casing section 23 positioned between the ring 14 and the base ring 22 suitable fastening means being provided to permit the bottom casing section to be opened for the removal of the accumulation of dirt and other foreign matter and to enable the bottom section to be secured together into engagement. with the rings 14 and 22. For this purpose, in the construction shown, the lower part of the outer casing is made in two parts 24 and 25 which are'preferably'secured on the front portion of a casting 26 of the heating element which supports the ash door 12. An ofiset groove 27 is formed in the upper edge of the bottom ring 22 so as to act as a guide or forming device about which the casing parts 24 and 25 can be bent into cylindrical form and with which they make ajoint or seal which is sufficiently air tight. The upperedges of the casing halves 24 and 25 cooperate similarly with the ring 14.

In order to fasten the outer or free ends of the casing parts 24 and 25 together when these parts are in closed position, any. desired fastening device may be provided, that shown including an angle bracket. 28 secured to the part 24 and an angle bracket 29, secured to the part 25. The angle bracket 28 has an outstanding ear 30 and the bracket 29 a similar outstanding ear 31. The ear 30 is provided with a hole through which a bolt 32 passes, the threaded end of said bolt being received by the ear 30 and being suitably secured thereto, for example, by a threaded washer or nut 33 on one side of said ear and a nut 34 on the other side of said ear, a lock nut 35 being also preferably provided adjacent the nut 34. The other end of the bolt 32 extending through the car 31 is provided with an eye pivotally connected by means of a pin 36 to an eccentric cam lock 37, said cam lock being provided permitting the casing parts 24 and 25 to spring apart as shown in Fig. 4. In order to prevent the casing parts 24 and 25 from becoming bent permanently into cylindrical shape, a plurality of beads 40 may be formed longitudinally of said casing halves so as to give them added stiffness- Any other means for holding the free ends of the parts 24 and 25 together maybe provided if desired.

In order to assure that the joints between the two casing parts is substantially air tight, I provide a slip joint 41. This'slip joint is formed by a vertical flange 42 turned back on the outer end of the casing part 24 and a vertical flange 43 turned back on the outer end of the casing part 25. The vertical flange. 43 is again doubled back on itself to form a vertical flange 44and-the flanges 43 and44 are spaced apart the thickness of the casing 24 and flange 42 as; shown in Fig. 7, sothat as the cam lock 37 is tightened, the flange 42 will be drawn in wardly between the flanges 41 and 43 thus forming a tongue and the casing parts.

It will be seen that when the casing parts 24 and 25 arein open position as shown in Fig. 4, cold air from the basement of the building will be drawn into the inside of the baffle 15 and be warmed so that the cold air may be withdrawn from the basement which air may be replaced by warmer air iffthe doors leading from the upper part of the building to the basement are left open. The casing parts are fastened by a fastening device of simple construction and practically no air is allowedto leak into the furnace from the outside. The ends of the casing parts 24 and .25, opposite the brackets 28 and 29, are rigidly secured to the casting on the furnace and are not secured thereto by hingeswhich would be apt to permit leakage of air into the furnace. The dirt which accumulates on the floor 19 can be easily removed by abrush or broom after theicasing halves 24 and 25 are opened and saiddirt is preferably burned in the furnace as it contains germs, dust, dirt and other objectionable matter from the air of the building being heated. i

I claim as my invention:

1. A furnace construction. including a heating element, an outer casin secured about a portion of saidelement and forming therebetween. a heating chamber, said casing having an opening in its lower section, and extending in a direction peripherally of When the groove joint between the casing, and a closure plate of resilient flexible sheet material secured at one end rigidly and firmly along one end edge of the opening and biased through its resiliency to extend therefrom when free,divergingly away from the opening, and means to lock the free end portion of said closure plate releasably to the casing when said plate is sprung toward the opening to close the same.

2. A furnace construction including a heating element, an outer casing secured about a portion of said element and forming therebetween a heating chamber, said casing having an opening in its lower section and extending in a direction peripherally of the casing, and a closure plate of resilient flexible sheet material secured atone end rigidly and firmly along one end edge of the opening and biased through its resiliency to extend therefrom when free, divergingly away from the opening, and means to lock the free end portion of said closure plate releasably to the casing when said plate is sprung toward the opening to close the same, said plate being corrugated in an endwise direction to increase its bias tendency to diverge from the opening when released at its free end.

3. A furnace construction including a heating element, a shell secured about a portion of said element and forming therewith a heating chamber, the shell along its lower edge being open in a peripheral direction to permit access to said chamber, apair of clo- 1 opening,

sure plates of resilient, flexible sheet material, each secured firmly and rigidly at one end to the heater at horizontally spaced sections thereof forming the ends of the opening at the lower edge of said sheet, said plates extending in opposite directions around the heater, and biased through their resiliency to diverge, when free, from said and means for securing the free end portions of said plates together and against the casing when said plates are sprung into positions to close said opening.

4:. A furnace construction including a heating element, a shell secured about a portion of said element and forming therewith a heating chamber, the shell along its lower edge being open in a peripheral direction to permit access to said chamber, a pair of closure plates of resilient, flexible sheet ma terial, each secured firmly and rigidly at one end to the heater at horizontally spaced sections thereof forming the ends of the opening at the lower edge of said shell, said plates extending in opposite directions around the heater, and biased through their resiliency to diverge, when free, from said opening, and means for securing the free end portion of said plates together and against the casing when said plates are sprung into positions to close said opening, said plates being each corrugated in an endwise direction to increase its bias tendency to diverge from the opening when released at its free end.

EDWARD BARELMAN. 

